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In the ultimate canine ancestral story, National Geographic explores the genetic journey from wolf to dog. Travel back 100,000 years to meet the "mother of all dogs" and trace the evolution of her descendents over the eons, even as we evolved ourselvesfrom cave dwellers to modern humans. Find out what scientists are learning about dogs' unique ability to communicate with humans, and how powerful brain chemicals work to cement our affection for each other. Delve into the history of selective breeding and see how man created dogs to serve our needs as laborers, companions, hunters, herders, and warriors, as well as to suit our aesthetic fancy.

From immense Great Danes and diminutive Chihuahuas to curly-haired poodles and streamlined greyhoundsit's no coincidence that dogs are in fact the most diverse mammals on the planet.

The DVD-R is a non-rewriteable digital format that is compatible with most commercial DVD players. The DVD-R format is created with MPEG2 Variable Bit Rate Compression with stereo sound.

How our DVDs and DVD-Rs Differ

Customers who purchase programs in the NG DVD Exclusives Library will receive a non-interactive, play only disc. There is no chaptering information on these DVDs, but there are chapter marks approximately every five minutes, which make it easy to fast forward through a program. The DVD-R format provides the digital video and audio quality you expect from all of our DVDs.

NOTE: The NG DVD-R titles are not closed-captioned. We apologize for any inconvenience this limitation may cause.

I got this DVD as I LOVE dogs, and it helped me understand how our dogs as companions came to be. On a personal note, the part about all the stray dogs had a special meaning. I adopted one of the dogs in the video from Stray rescue. He was the black & brown dog that was rescued from East St Louis and "Ned" is a super pet for me & my husband.

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The dog is the ultimate human creation. With 400 breeds and counting, the dog is more varied in size and behavior than any other species on the planet. National Geographic looks at man's evolutionary manipulation of dogs' appearance, talents and temperamentand the accelerating efforts to create breeds to suit our needs (more than 80 percent of today's breeds did not exist 150 years ago). From desirable traits like supersensitive hearing and smell to the unintended consequences of genetic diseases, learn how nature and man have partnered to deliberately create new and specialized versions of man's best friend.

National Geographic follows a group of four-legged forces to be reckoned with in today’s workplace. They diagnose bladder cancer by the smell of a patient’s urine. They bust drug smugglers hiding massive quantities of marijuana. They locate people trapped in the rubble of collapsed buildings. And they apprehend criminals fleeing the scene of the crime. Their work is challenging, stressful and often dangerous, but for the thousands of highly trained working dogs that clock in for duty each morning, it’s all in a day’s work.

Called by one philosopher "the noblest beast God ever made," dogs have served humankind in more ways than any other animal. You'll see loyal canines at work as they search for buried victims of an earthquake disaster, assist the physically disabled, and pull sleds in the blizzard conditions of Alaska. Find out how dogs are trained to "act" on the Lassie television show, and meet dogs that served as messengers on the battlefields of WWII.

South African filmmaker, John "JV" Varty, has spent some forty years photographing and working with big cats. His efforts were instrumental in helping Londolozi Game Reserve become one of the world’s premiere spots to view wild leopards. As the 21st Century began, Varty turned his attention to arguably the most endangered of big catsthe tiger.

In a showdown between the fastest land mammal and two of the quickest and most elusive athletes in professional sports - who wins and what shocking secrets are revealed? The Tennessee Titans' Chris Johnson and the Chicago Bears' Devin Hester take part in an extraordinary one-on-one challenge against a cheetah in the race of a lifetime that has never been attempted before.

Big cat expert Boone Smith has worked in the harshest conditions imaginable, tracking the most elusive cats on the planet. But his new mission brings us closer to the action than ever before. Only an inch of acrylic separates Boone from one of the world's top predatorsthe African lion. Boone explores each stage of a lion's kill, tracking a lion coalition as they hunt, ultimately putting him face to face with one of the worldls mightiest apex predators.

They are members of every brand of the military, the Secret Service and law enforcement agencies worldwide and they have helped take down some of the most infamous terrorists in history. They are the K-9s of Vohne Liche Kennels (VLK), one of the premiere K-9 training facilities in the world, where "Alpha Dogs" are trained for service. Go behind the scenes at VLK as Ken Licklider and his trainers work tirelessly to elite working dogs that are the best of the best.

Witness a man's quest as he risks everything to be the first to fly across the English Channel using a single, jet-propelled wing attached to his back. Swiss adventurer Yves Rossy fired up his homemade jet wing, jumped from a plane and crossed the 23-mile channel at about 118 miles per hour in 12 to 15 minutes. Go behind the scenes with Rossy and hear the incredible story of his quest.

Experience the full force of coalition forces in Iraq and live life on the frontlines. The Devil Dog Diaries provides a rare, inside look at life in wartime from the perspective of the young men in a battalion of the 1st Marine Expeditionary Force. With veteran filmmaker Gary Scurka in tow, the marines encounter ambushes and fire fights, engage in dangerous missions in cities along the way, endure sniper fire and sandstorms and lead the charge into Baghdad. Yet despite their feats, most of these Marines are young cadets straight out of high school, shipped to a far off desert to engage in a war for reasons they may not fully understand.